Default Switch Information - Cisco Catalyst 3550 series Software Configuration Manual

Chapter 4 Assigning the Switch IP Address and Default Gateway

Default Switch Information

Table 4-1
Table 4-1
Feature
IP address and subnet mask
Default gateway
Enable secret password
Host name
Telnet password
Cluster command switch functionality
Cluster name
Understanding DHCP-Based Autoconfiguration
The DHCP provides configuration information to Internet hosts and internetworking devices. This
protocol consists of two components: one for delivering configuration parameters from a DHCP server
to a device and a mechanism for allocating network addresses to devices. DHCP is built on a
client-server model, in which designated DHCP servers allocate network addresses and deliver
configuration parameters to dynamically configured devices. The switch can act as both a DHCP client
and a DHCP server.
During DHCP-based autoconfiguration, your switch (DHCP client) is automatically configured at
startup with IP address information and a configuration file.
With DHCP-based autoconfiguration, no DHCP client-side configuration is needed on your switch.
However, you need to configure the DHCP server or the DHCP server feature on your switch for various
lease options associated with IP addresses. If you are using DHCP to relay the configuration file location
on the network, you might also need to configure a Trivial File Transfer Protocol (TFTP) server and a
Domain Name System (DNS) server.
The DHCP server or the DHCP server feature running on your switch can be on the same LAN or on a
different LAN than the switch. If the DHCP server is running on a different LAN, you should configure
a DHCP relay. A relay device forwards broadcast traffic between two directly connected LANs. A router
does not forward broadcast packets, but it forwards packets based on the destination IP address in the
received packet.
DHCP-based autoconfiguration replaces the BOOTP client functionality on your switch.
DHCP Client Request Process
When you boot your switch, the switch automatically requests configuration information from a DHCP
server only if a configuration file is not present on the switch.
DHCP autoconfiguration does not occur under these conditions:
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shows the default switch information.
Default Switch Information
When a configuration file is present and the service config global configuration command is
disabled on the switch.
Default Setting
No IP address or subnet mask are defined.
No default gateway is defined.
No password is defined.
The factory-assigned default host name is Switch.
No password is defined.
Disabled.
No cluster name is defined.
Catalyst 3550 Multilayer Switch Software Configuration Guide
Assigning Switch Information
4-3